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Finding the Fourth Proportional to 844.80, 1,257.78 and 844.80

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Solution

The fourth proportional to 844.80, 1,257.78 and 844.80 is: 1,257.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    844.80 : 1,257.78 = 844.80 : x
  2. Step 2: Convert to fraction form
    844.80/1,257.78 = 844.80/x
  3. Step 3: Cross multiply
    844.80x = 1,257.78 × 844.80
  4. Step 4: Simplify right side
    844.80x = 1,062,572.54
  5. Step 5: Solve for x
    x = 1,062,572.54/844.80
  6. Step 6: Final answer
    x = 1,257.78

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.